Format

      { DUPLICATES                    }
      { CHANGES                       }
      { NULL_KEY                      }
      {                               }
      { NULL_VALUE null-value         }
      { DATA_AREA area-number         }
      { DATA_FILL numeric-literal     }
      {                               }
      { DATA_KEY_COMPRESSION          }
      { DATA_RECORD_COMPRESSION       }
      { INDEX_AREA area-number        }
      {                               }
      { INDEX_COMPRESSION             }
      { INDEX_FILL numeric-literal    }
      { LEVEL1_INDEX_AREA area-number }
      {                               }
      { NODATA_KEY_COMPRESSION        }
      { NODATA_RECORD_COMPRESSION     }
      { NOINDEX_COMPRESSION           }
      {                               }
      { PROLOG numeric-literal        }
      { SEGMENT within-name-clause    }
      { SORTED BY ASCENDING           }
      {                               }
      { SORTED BY DESCENDING          }